When blue is blue

Scientific treatise and study on the composition of the paint on the Protectorate 5h blue linden leaf stamp. Study of the dependence of the amount of paint on the color shade of postage stamps.

03. 05. 2025
Complete description

Postal Card with imprint:

Date of Issue: 31. 08. 2007
 

Angličtina / English

Use translation by Google Translate (no guarantee).

Poštový lístok s natlačenou známkou Doprava na Dunaji s prítlačou ku zberateľskému veľtrhu Riccione 2007.




Deň vydania: 31. 8. 2007 (koniec platnosti 31. 12. 2009)
Nominálna hodnota: 10 Sk
Autor prítlače: Peter Čepec
Predajná cena: 13 Sk


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